Printed wiring board with mounted circuit element using a terminal density conversion board
First Claim
Patent Images
1. A printed wiring board with mounted circuit elements, comprising:
- an integrated circuit having terminals with a first interterminal pitch; and
a terminal density conversion board having;
a first surface with conductive pads spaced with the first interterminal pitch on which said integrated circuit is mounted with the terminals of said integrated circuit respectively connected to the conductive pads;
a second surface having conductive pads spaced with a second interterminal pitch larger than the first interterminal pitch; and
internal wiring respectively connecting the conductive pads on the first surface with the conductive pads on the second surface,said terminal density conversion board being mounted on said printed wiring board with the conductive pads on the second surface of said terminal density conversion board respectively connected to conductive portions spaced with the second interterminal pitch on a surface of said printed wiring board.
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Abstract
A method and apparatus are provided for mounting circuit elements on a printed wiring board, wherein an integrated circuit having terminals with a first interterminal pitch are mounted onto a first surface of a terminal density conversion board which converts the first interterminal pitch of the integrated circuit to terminals with a second interterminal pitch larger than the first interterminal pitch on a second surface of the terminal density conversion board; and the terminals on the second surface of the terminal density conversion board with the second interterminal pitch are mounted onto the printed wiring board.
176 Citations
11 Claims
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1. A printed wiring board with mounted circuit elements, comprising:
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an integrated circuit having terminals with a first interterminal pitch; and a terminal density conversion board having; a first surface with conductive pads spaced with the first interterminal pitch on which said integrated circuit is mounted with the terminals of said integrated circuit respectively connected to the conductive pads; a second surface having conductive pads spaced with a second interterminal pitch larger than the first interterminal pitch; and internal wiring respectively connecting the conductive pads on the first surface with the conductive pads on the second surface, said terminal density conversion board being mounted on said printed wiring board with the conductive pads on the second surface of said terminal density conversion board respectively connected to conductive portions spaced with the second interterminal pitch on a surface of said printed wiring board. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A terminal density conversion board for mounting an integrated circuit on a printed wiring board, comprising:
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a first surface having conductive pads spaced with a first interterminal pitch on which the integrated circuit is mounted; a second surface having conductive pads spaced with a second interterminal pitch larger than the first interterminal pitch; and internal wiring respectively connecting the conductive pads on said first surface with the conductive pads on said second surface, wherein terminals with the first interterminal pitch of the integrated circuit are respectively connected to the conductive pads on said first surface of said terminal density conversion board and the conductive pads on said second surface of said terminal density conversion board are respectively connected to conductive portions spaced with the second interterminal pitch on a surface of the printed wiring board. - View Dependent Claims (11)
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Specification